CVE-2023-43804CWE-200

`Cookie` HTTP header isn't stripped on cross-origin redirects

Medium · published October 4, 2023

CVSS v3.1
5.9
EPSS
1%
Percentile
71.5
In the wild
Unconfirmed
What it is

urllib3 is a user-friendly HTTP client library for Python. urllib3 doesn't treat the `Cookie` HTTP header special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user. However, it is possible for a user to specify a `Cookie` header and unknowingly leak information via HTTP redirects to a different origin if that user doesn't disable redirects explicitly. This issue has been patched in urllib3 version 1.26.17 or 2.0.5.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.01360 · 71.5th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2023-10-04T16:01Z
EPSS history
Timeline
  • 04 OCT 16:01Z
    `Cookie` HTTP header isn't stripped on cross-origin redirects
    cvelistv5